TeamSpeed wrote in post #18891870
For lizards, it is the frequencies being generated most likely, more so than the volume of the sound you are hearing. They have a range of 400 to 1500 Hz, which is quite low. As an example, those test tones you hear on the radio or TV are in this basic range (probably around 1000 Hz), or that wha-wha-wha sound of Charlie Brown's teacher.
I suspect that even with a quieter shutter (to our ears), the frequency may still be enough to scare some animals.

Eventually sensor tech (Sony has some things in the pipeline I believe) will be good enough to allow for fully operational global shutters that don't create the rolling effect, etc.
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In my case, I had gotten this lizard used to me and had photographed him for about an hour and a half with my 1D4. . I got him real used to me and over the hour and a half moved closer and closer until I was about three feet away from him (near MFD with my 100-400 v2). . I felt that I could get much closer to him, but my 100-400 doesn't focus any closer than 2 or 3 feet, so I pulled out my cell phone and slowly, steadily, extended it towards him until it was only a few inches away from him. . Then, when I pressed the "shutter", it made this tiny little faint sound, and he bolted! . Gone!
I think the fact that the sound came from only a couple inches away is what spooked him. I think this because when I was using my 1D4, I was 2 or 3 feet from him, and didn't have it on silent mode, and he was totally fine with the loud clunk.
So I think it was the insanely close proximity of the sound that scared him, but I don't know that for sure, and you may be right on the money with your "frequency" idea.
By the way, Cary, this happened just last week, not too far from you .... in Oklahoma, which I think is less than a thousand miles from your place, right?
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"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".